Improvement in composition roofs



I COATING OR PLASHU. v E a. 76 Cross Reference NJ m EXAMINER EDWARD WES-TERMAYR.

Composition Roof.

No. 122,296. Pat'entedDec.26,I871.

Fig. 1

.Wihmassesk- T I'm-rafter v Roofs; and I do hereby declare that the following like surface, covering the whole roof without any of felt or tarred rough-surfaced paper, B, or its plastic state. This gives the boards under the UNITED STATES P a 4/ wet Srncmrcarron.

To whom it may concern:

Be it known that I, EDWARD Wnsrnnmrn, of Chicago, in the county of Cook and State of Illinois, have invented a certain Improvement in is a full, clear, and exact description thereof, reference being bad to the accompanying drawing, which, together with the letters and figures marked thereon, forms part of this specification, and in whichv Figure 1 is a top or plan view of myimproved roof, being partly broken away to show the fibrous foundation. Fig. 2 is a section of same.

Like letters of reference made use of in the several figures indicate like parts.

Nature of the Invention.

The first part of this invention relates to a new roofing material, forming, when finished, a stonespaces or joints. The second part of this invention relates to the peculiar mode of afiixin g the abox e surface to the boards of an ordinary roof.

To enable those skilled in the art to make and use my invention, I will proceed to describe the same with particularity, making use, in so doing, of the aforesaid drawing.

v General Description.

The roof .is first covered in the usual manner with the boards A, upon which is laid a covering equivalent. The rough surface of the fibrous material is desirable to facilitate the adherence of the stone-like material C, hereinafter more fully described, and which is laid over'it while in a stone and fiber a chance to shrink and swell without cracking and breaking the surface of the roof, the stone and its fibrous elastic foundation being entirely independent of their expansion and contraction from the boards of the roof. The surface material 0 consists of a composition stone or cement, laid on while still plastic. I do not limit IOllS OI W myself to any special mixture or artificial stone OF CHICAGO, ILLINOIS.

. IMPZROVEMENT IN COMPOSITION ROOFS. 5 D Specification forming part of Letters Patent No. 122,296, dated December 26, 1871.

I for this material, but find the following to be a very good covering, becoming, after a time, very hard, and not being liable to crack in drying, and also quite impervious to water and frost. I take about three mea-s ur es p f dry sand one measure of gravel one measure of c en ommon Portan cement answers ex'ce e well for this purpose, although other cements may be employed.) Theseingredients are mixed intimately together in adry state. I then dissolve about one pound of lime one-fourth poundofli uid lass or natron silwum on e-eighth pound of al u'ih 'ifigbout six gal- With this liquid 1 mix the dry ma teriala ove mentioned,usingenough of theliquid to produce a dough-like mass or mortar. Theroof,

already properly covered with the fibrous material B, is divided into squares of eig 0 en ee "1n length and breadth, by means of narrow strips,

as is shown in the drawing D-this for the purpose of insuring an even distribution of the surface material. In about forty-eight hours the surface material will have become hard enough to allow of the removal of the strips D, when the cavities left thereby may be filled with fresh material and the whole allowed to harden until completely dry, after which, as a further preservative from the weather, the whole is covered with a coat of common linseedoil.

The above proportions and ingredients may be somewhat varied, and I do not intend to limit myself to the exact proportions given.

Claims.

specified.

. EDW. WESTERMAYR.

Witnesses:

J. W. Mnnnnx,

JULIUS WELCKIE. (126) ATENT OFFICE. 294

EDWARD WESTERMAYR, 

